Lighting device for sewing machines



May 17, 1932'. E. E. SEE 1,858,564

LIGHTING DEVICE FOR SEWING MACHINES Filed April 14, 1950 Z ShQEtS-ShBe'l} l E. vwemtoz L 5 QWWM May 17, 1932. E. E. SEE 1,858,564

LIGHTING DEVICE FOR SEWING MACHINES Filed April 14, 1930 2 Sheets-Sheet 2 7 1 41. J 1.3. SL1... wveulioz Patented May 17, 1932 EDWARD E. SEE, OF OMAHA, NEBRASKA LIGHTING nnvrcn non snwnve MAoHmns Application filed April 14,

This invention relates to lighting devices for sewing machines. In devices of this character, particularly when attached to sewing machines operated at a high rate of speed, the

. life of the lamp filament is greatly shortened,

due to the vibration ofthemachine which sets up a sympathetic vibration of the filament that soon causes its destruction.

It is therefore the object of my invention to provide a lighting device for sewing machines of simple, durable, and inexpensive construction that will so dampen and. absorb the vibration set up by the machine that the life of "the filament will not be materially shortened. r

It is a further object to provide a device of this character that has a support for the light that is flexible longitudinally in a plurality of intersecting planes and also with torsional flexibility of the various parts of the support, both being for the purpose of damping and reducing the amplitude of the vibrations imparted by the machine so that they will be reduced to a minimum before reaching the lamp filament. Additional vibration damping is effected by the weight of the floating parts which increase the inertia of said floating parts so that the natural vibration of the support is slow relative to that of the machine and of the filament. An adjustment of the support longitudinally lengthens or shortens it to-thereby vary its natural period of vibration and avoid synchronous vibrations that may be set up in it and the lamp filament by the machine.

A still further object is to provide a lighting device adjustable longitudinally of the horizontal arm of the sewing machine gooseneck and also having a variety of adjustments of the support and the shade to permit the light to be thrown at any desired angle and particularly so that it may be directed into the slot of the resser-foot to insure precision and accuracy in doing fine work, such as design sewing, while at the same time protecting the eyes from objectionable heat and lare.

b A further object is to provide a shade for the electric lamp so attached to the lampsocket that it is readily removable to facili- 1930. Serial No. 444,101.

tate insertion of the the socket.

I'attain these objects by'the device 'illus trated in the accompanying drawings, in which: 7 f i F 1g. '1 is aperspective view of the lighting device attached to the horizontal arm of a sewing machine gooseneck and positioned so that the light will be cast on the operative sewing parts of the machine and on the work i that may be handled. f

Fig. 2 is a plan view of the lighting device showing a portion of the horizontal arm to which it is attached. A

Fig. 3 is an end elevation of the device-detached from the arm. i

Fig. 4 is a side elevation with a portion of the shade and socket broken away to show the method of attachment of the shade to the socket and also showing, in dotted lines, the shade and socket tilted up and back.

Flg. 5 is a perspective view of the upright member of the'support showingthe attachment of the ends of the perforated clamp strap and a portion of the horizontal support arm. V

In carrying out my invention according to the illustrated embodiment, I provide a jointed support including a clamp comprising a looped metal strap 10 adapted to embrace the horizontal arm 11 of a sewing machine gooseneck 12. The strap is perforated throughout its length by spaced openingsto give it greater flexibility and to provide means for adjusting its effective length to fit sewing machine goosenecks of diflerent sizes. Abolt l3 extendsthrough the ends of the strap 10 and the lower ends of the legs 14 of aninverted U shaped upright support member, said legs being spaced apart by a sleeve 15' on the bolt 13. A nut 16 on-the bolt servesto tighten the strap on the arm 11 and hold the clamp and upright member rigidly together. f The horizontal upper portion 17 of the upright member has an aperture in which is received an upwardly projecting bolt 18 secured in the part 17 by a nut 19. The upper end of said bolt 18 supports slidably and rotatably a longitudinally slotted horizontal support arm 20 and has a wing-nut 21 for securing the i lamp or its removal from arm at any desired adjustment relative to the upright member. By means of the longitudina-l adjustment the length of the support may be varied, a feature particularly 5 important for securing a dilferent natural period of vibration in the support to break up sympatheticvibration therein caused by the machine; By the longitudinal adjustment in combination with the swinging ad justment of the arm about the axis of the bolt 18 the support-ed lamp may be positionedlto best direct the light therefrom onto the presser-foot and the needle of-the machine and the fabric adjoiningthe same. 7 A U; shaped bracket, having upwardly extending ears 22, isprovided with an aperture in the horizontal lower portion in whichis received andownwardly. projecting bolt- 23. On the bolt, beneath thebracket, is a having a downwardly and forwardly extendingslotted arm2l and an upwardly and rearwardly extending slotted arm 25. The bracket and the stop member are secured rigidly together on the bolt 23 by a nut 26. The lowerend of the bolt23 is received in an aperture in the horizontal arm adjacent to the free end-thereof, said bracket and stop being, adapted to be rotated relative to the horizontal arm but being normally held .againstmovement by a wingnut27. A lampsocket 28 of a usual type, provided with a switch and with a conductor cord 29, has a yoke with rearwardly extending ears 30 engaged pivotally with a bolt 31 mounted in ,the upwardly extending ears 220i the bracket and held against longitudinal 'movement by a nut he o ket i adapt l b w g fr m eno i 'l her ze tal P it Whereit 1 rests on thefstop-arm 24, to a raised position .wkr reitrests: oaths st0P tm25 as indicated by the dotted lines in I timesdesirable to so tilthtlre lamp to a place at-Iiwhich it is out of {the Way I of the operator threading ema h t Me d 3- 5 PJ vide d forthe electricincandescent lamp carried by, the soeket 28, the open end of the shadehaving a grooved, band 3a which is detachably engaged with an. annular disk having a threaded flange 36, secured ,on -swaged threadsofhe socket. The band 34 embraces slightly more thanhalf the circumference of the disk so that theends of the band grip orclamp onto, the disk just below its: widest part and hold the shade firmly 1n said disk The shade istherefore readily removable to facilitate the insertion or removal of the lamp fromthesockena feature that is not found, in electriclamp shades now in use. It is to be noted that the legs .14 of the upright member, and the stopportions rated longitudinally by slots,, thus giving said vparts greaterlongitudinal and torsional 1' flexibilityr The longitudiiia1 flexibility 1 of inalraised position, I bracket isconnected to swing about awvert cal Fig. 4, 1t belng some- 7 placebut permit it to be readily, rotated on the horizontal arm 20, 24 and 25 are'perfomentioned-plane at an angle determined by heangleat..,whieh.fih y are adjusted on the The advantages of this device are that a simple,"durabl'e"and inexpensive lighting device forg sewmg, machines, is provided whereinthe, vibration of, the machine will H be, dampened-and absorbed Ibythe various stop member parts of the support solthat they willbe practically; harmless to the lamp filament by the time they reach said filament] The support is adjustable longitudinallyfto change the natural periodof vibration thereof and break up vsynchronous vibrations induced by the vibrations of the machine, A ndthe shade of thedevice gis, detachably secUlB-d to'gthe socket to, facilitate the insertion or removalfpfthe lamp-bulb v i Having thus described myinventiomI claim: 1

n a ighting evice f r. w ng. chines, an electric lamp-socket, a bracket to which said, socket, is :pivotally y connected to swing, about, ya horizontal. axis, the bracket havingfa resilient stop-arm adapted to yieldinglyvsupport the socket i-n a substantially horizontal position @Iidhaving another stoparm adapted .to yieldingly support the socket arr arm to which said member. to the arm ,0 ,a sewing machine.-

2. In a,dev1ce of the class,described, a,

clampfmember. adapted for connection with a support, an upright 7 member connected with said clamp-member, said upright member. comprising Ia plurality of flat substantially parallel laterally spaced resilient'elements affording lateral and torsional flexibility in,s ai,d;upright member as a-whole, a

, flat longitudinally slotted arm connected with the. .upper, end of. said upright member to swing, about .an axis longitudinaljthereto and to slide transyersely wthereof,'-{1 neans for holding said arminadjusted relations to said upright member, and a lamprsocket connected 7 pivotally with the outer end portion of {said arm. 7

3.;In a devic e ofzthe class described, a clamp-member adapted for fixed connection with a-supp ort,.an upright member connectd; h sai c amp-m m er and, compr ing a plurality of longitudinally slottedflat stantially parallel laterally spaced flexible elements, a fiat longitudinally slotted arm connected with the upper end of said upright member to swing about an axis longitudinal thereto and to slide transversely thereof,

means for holding said arm in adjusted relations to said upright member, a bracket connected with the outer end of'said arm and swingable about a vertical axis, a lampm socket connected with said bracket to swing about a horizontal axis, and resilient stop means for yieldingly supporting said socket. in a substantially horizontal position and in a raised position.

EDWARD E. SEE. 

